media/capture/video/fake_video_capture_device_factory.cc - Issue 2143903003: [WIP] Move media/capture to device/capture

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Issue 2143903003: [WIP] Move media/capture to device/capture (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Created 4 years, 5 months ago

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1 // Copyright 2014 The Chromium Authors. All rights reserved.

2 // Use of this source code is governed by a BSD-style license that can be

3 // found in the LICENSE file.

4

5 #include "media/capture/video/fake_video_capture_device_factory.h"

6

7 #include "base/command_line.h"

8 #include "base/strings/string_number_conversions.h"

9 #include "base/strings/string_split.h"

10 #include "base/strings/string_tokenizer.h"

11 #include "base/strings/string_util.h"

12 #include "base/strings/stringprintf.h"

13 #include "build/build_config.h"

14 #include "media/base/media_switches.h"

15

16 namespace media {

17

18 // Cap the frame rate command line input to reasonable values.

19 static const float kFakeCaptureMinFrameRate = 5.0f;

20 static const float kFakeCaptureMaxFrameRate = 60.0f;

21 // Default rate if none is specified as part of the command line.

22 static const float kFakeCaptureDefaultFrameRate = 20.0f;

23

24 FakeVideoCaptureDeviceFactory::FakeVideoCaptureDeviceFactory()

25 : number_of_devices_(1),

26 fake_vcd_ownership_(FakeVideoCaptureDevice::BufferOwnership::OWN_BUFFERS),

27 frame_rate_(kFakeCaptureDefaultFrameRate) {}

28

29 std::unique_ptr<VideoCaptureDevice> FakeVideoCaptureDeviceFactory::Create(

30 const VideoCaptureDevice::Name& device_name) {

31 DCHECK(thread_checker_.CalledOnValidThread());

32

33 parse_command_line();

34

35 for (int n = 0; n < number_of_devices_; ++n) {

36 std::string possible_id = base::StringPrintf("/dev/video%d", n);

37 if (device_name.id().compare(possible_id) == 0) {

38 return std::unique_ptr<VideoCaptureDevice>(

39 new FakeVideoCaptureDevice(fake_vcd_ownership_, frame_rate_));

40 }

41 }

42 return std::unique_ptr<VideoCaptureDevice>();

43 }

44

45 void FakeVideoCaptureDeviceFactory::GetDeviceNames(

46 VideoCaptureDevice::Names* const device_names) {

47 DCHECK(thread_checker_.CalledOnValidThread());

48 DCHECK(device_names->empty());

49 for (int n = 0; n < number_of_devices_; ++n) {

50 VideoCaptureDevice::Name name(base::StringPrintf("fake_device_%d", n),

51 base::StringPrintf("/dev/video%d", n)

52 #if defined(OS_LINUX)

53 ,

54 VideoCaptureDevice::Name::V4L2_SINGLE_PLANE

55 #elif defined(OS_MACOSX)

56 ,

57 VideoCaptureDevice::Name::AVFOUNDATION

58 #elif defined(OS_WIN)

59 ,

60 VideoCaptureDevice::Name::DIRECT_SHOW

61 #elif defined(OS_ANDROID)

62 ,

63 VideoCaptureDevice::Name::API2_LEGACY

64 #endif

65 );

66 device_names->push_back(name);

67 }

68 }

69

70 void FakeVideoCaptureDeviceFactory::GetDeviceSupportedFormats(

71 const VideoCaptureDevice::Name& device,

72 VideoCaptureFormats* supported_formats) {

73 DCHECK(thread_checker_.CalledOnValidThread());

74 const gfx::Size supported_sizes[] = {gfx::Size(320, 240),

75 gfx::Size(640, 480),

76 gfx::Size(1280, 720),

77 gfx::Size(1920, 1080)};

78 supported_formats->clear();

79 for (const auto& size : supported_sizes) {

80 supported_formats->push_back(

81 VideoCaptureFormat(size, frame_rate_, media::PIXEL_FORMAT_I420));

82 }

83 }

84

85 // Optional comma delimited parameters to the command line can specify buffer

86 // ownership, buffer planarity, and the fake video device FPS.

87 // Examples: "ownership=client, planarity=triplanar, fps=60" "fps=30"

88 void FakeVideoCaptureDeviceFactory::parse_command_line() {

89 const std::string option =

90 base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(

91 switches::kUseFakeDeviceForMediaStream);

92 base::StringTokenizer option_tokenizer(option, ", ");

93 option_tokenizer.set_quote_chars("\"");

94

95 while (option_tokenizer.GetNext()) {

96 std::vector<std::string> param =

97 base::SplitString(option_tokenizer.token(), "=", base::TRIM_WHITESPACE,

98 base::SPLIT_WANT_NONEMPTY);

99

100 if (param.size() != 2u) {

101 LOG(WARNING) << "Forget a value '" << option << "'? Use name=value for "

102 << switches::kUseFakeDeviceForMediaStream << ".";

103 return;

104 }

105

106 if (base::EqualsCaseInsensitiveASCII(param.front(), "ownership") &&

107 base::EqualsCaseInsensitiveASCII(param.back(), "client")) {

108 fake_vcd_ownership_ =

109 FakeVideoCaptureDevice::BufferOwnership::CLIENT_BUFFERS;

110 } else if (base::EqualsCaseInsensitiveASCII(param.front(), "fps")) {

111 double fps = 0;

112 if (base::StringToDouble(param.back(), &fps)) {

113 frame_rate_ =

114 std::max(kFakeCaptureMinFrameRate, static_cast<float>(fps));

115 frame_rate_ = std::min(kFakeCaptureMaxFrameRate, frame_rate_);

116 }

117 }

118 }

119 }

120

121 } // namespace media

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